Improvement in padlocks



amata para can,

""DAN11EL `Kj-MILLER, or READING, PENNSYLVANIA,

- LV livrnovnMnNr IN PeDLocKs.

" t The Schedulerzeferred to in these Letters Patient and mkingrpartof the same `L'DMEMEL K. Reu-ding, county of Berks,

' State of Pennsylvania, .havelinvented an Improvement q `xn Locks,of which the followingisa specification.

Nature `and VObjectsofY thcInceatiotnf y lMyjinrention' consistsofacase, a sliding-bnr, (the case being recessed furthe-receptiono'a staple.) andiv `devices for securing the bar in its A'position after it has been adjusted,so as to prevent the Vescapeof the staple from the recess. 4 i

Myln'vention further consists of certain devices for i j operating and locking the sliding'bar, and .for closing;vv

`the'key-hole when the tn mblers are iuqapositio'n to i 1 permit themovernet the bar.

Descriptionjof the Accompanying Ddicing. j Figures 1 and 2 are plan views of my improved pad'- lock, showing the operatingparts in dierentpositions, thecap or topplatepf thelockbeing removed;

y Figure isa sectional plan Figure 4a vertical section on the line 1-2, g.` 1;

Figure `5, an exterior view, drawn to a reduced scale; y i i f Fignre, a side view of the key; and A f Figure 7, a plan view `of the key.

General Description.'

The case A`of `the lock is, in the present instance, circular in shape, Valthough it may be of any other suit. able-form, and consists'of the bottom plate al, rim b4 and top plate ,or cover c. i n e Within the case is a metal bolt or sliding bar, B, theaenlarged head B of which. projects through an Iopening in the rim b, the boltv being guided by a rib,

el, andalug, d', so that it can move freely in the di- `rection of its length.-

In 4the `head. of the bar is a slot or recess, x, the mouth ofwhich is at one edge of the bar, the slotbeing so arrangedthat, whenthe barv is at the limit of its inward motion, the inner portion'of this slot will be opposite to and `communie-ate 'with Aslots or recesses y y in the top and bottom plates of the case, the mouth of the slot :v being closedlby the lug d', fig. 1.

-o a pin, e, within the case, is hung an L-shaped dog, C, one arm, f, of which' is opposite to one edge of the sliding bar B, and is adapted to a recess',-z', in

,the same,- the other arm, f', extending beneath an arm, g, hung to the pin e, and maintained in contact i with` the arm f by a Spring, 191

A spring, h,`within a recessirr the -bar B, bears ou a'loosc pin, h, and tends to project 4the bar outward,

i a projection, fi', ou `the edge of the bar, being so arranged as to strike the dog C and limit the outward movement of the bar. l

0n a pin, el, vibratefour quadrants or tumblers, n

u, Stclpthe curved edges of which are opposite to a projection, m, on the dog` C, and in' the edge .of each tumbler is a notch, o.`

e Springs 1c, attached tothe tumblers, hear against l the under side of thearm f' of the do(r C, and tend blers in' contact with a pin o r stOp, e2.

to maintain the straight sides or edges x of the tnmg ,'jlhe pin @projects slightly above the tumbler-s, I

through athin plate or washer, s, and into an opening,in,the center of 'a cam-disk, D, of' the form shown in the drawin'gga central circular hub, t, cn the upper face of the disk, tting nicely in. an opening in the top plate c of the case.

-Inthe h nh t and inthe disk is 'a'short slot, u', which Vlexteiidsat one'side of the hub to the outer edgeof thedisk,- and inthe plate c ofthe case is an L-shaped slot or key-hole, tv, which coincides with the slot u in the. disk, when the latter is'turued to the proper position to admitthe key.,

The' arm g extends beyond. the arm f and opposite to the edge of ,the calnfdisk D, a shoulder, lvon the latter, when the Vrecessed edge of the disk is opposite the `arm g, bearing against theY end of the arm, `Vas shown-in fig. 1. t

Vhen the bolt o'r bar B is at the limit of' its outward motion, as shown in fig. 2, the slot x is so exposed that a staple, attached to a case or other object, may be passed into the said slot, after which the bolt may be depressed, so, as to carry the slot'below the' edge of the case and the staplewithin the recesses y y', the mouth of the slot :t being thus close'd, "so that, while the bar remains in its position, the staple is contained within and protected by the body ofthe case, and is much less liablev to be injured than when connected to a projecting hasp in the usual manner.

The cam D is of such a shape'than'when inthe position shown in g. 1, the arm g will rest on the arm f of the'dog O, a position in which it is maintained by the spring g', the springs vlc being too weak to move .the arm j, so that the arm f is retained in the recess t', and 'from contact with the tumblers. `Any movement, therefore, which may be imparted to the tumblers by wires introduced through the key-hole or otherwise will not serve in any way to indicate the position they should assume toTreIeaSe the bolt, norwill the dog change its position, even' if all the slots o are brought in a line to receive the projection m.

When, however, the cam D is turned in the direction of the arrow, the .arm gwill be carried away from the arm f', so that the springs k'can act on the dog, which will then vibrate, and the projection m will cnter the slots o the moment the latter are brought in a line opposite the said projection, the withdrawal of the dog from the bolt B releasing the latter, and the spring h' throwing the bolt outward until the lugvt and tumblers by a key, J, consisting f'a dat plate,

having at the lower end a projection, h', an arm, q, extending from one side of the projection, and a serrated arm or projection, r.

he key, after being passed into the keyhole, rests upon the pin e, the arm q extending through the slot u in the disk, and the projection fr extending below the disk, as shown in' iig. 4.V

As the key is turned the disk D is first revolved, so as to throwback the arm q, when the'springs 1c will throw the dog C against the tumbler-s o1, the serrated projection fr, on the further movement ofthe key, adjusting the tumblers to such position that the projection m can enter thenot-ches c.

It will be seen that the disk D moves independently and prior to the movement of the tumblers, and that the arm gis not raised until a slight movement of the disk has been effected. By this means the slot u is carried from below the key-hole w, and the latter is closed before the dog O is caused to bear on the tumblers, thus eiectually preventing the introduction of any wires through the key-hole to operate the tum-v blers while the dog is bearing upon the same.

As the disk D is turned, the arm q ot" the key is carried beneath the top plate c, so that the key cannot be withdrawn until the disk is turned back to such a position as to permit the arm g to bear upon, the arm f' of the lever. The arm f will thus be carried to bear against the edge ofthe bolt, so that, when the latter is brought to the position shown in fig. 1, the dog will enter the recess i, and lock the bolt in its place.

From -the above description, it will be seen that, even should the tumblers be moved by wires or otherwise to the proper position for the notches to receive the project-ion on the dog, the latter willv remain in contact with the bar until the pressure of the spring g' on the dog is overcome, and that to remove this pressure it is necessary to rst move the earn D, which movement will close the key-hole and prevent the in trcduction of wires to operate the tumblers.

Inas'rnuch as the key turns with and follows the tumblers, it cannot become worn by slidingon the latter.

Instead of a. recess, x, in the bar B,- the latter may have only a projection or arm, x2, which', when the bar is depressed, closes the recess y.

lI do not claim a case having a recess and a bar arranged to slide across the said recess; but

I claiml. A lock-case, having a slot or recess, y, near one edge, in' combination with the bar B, retained permanently in connection withl the ease, and sliding in a direction to and from the rim of the same, and so constructed'as to close the mouth of said recess when at the limit of its'inward movement, substantially as described.

2. The bar B with its recess z, in combination with the case A and its recess y, and with the within-described devices, or their eqnivalents, for operating the bar, when the recesses a: and y are so arranged as to coincide with each other when the bar is at the limit of its inward movement.

3. A dog, O, arranged within a case containing a series of tumblers, in combination with a shield orV guard, D, and with the within-described devices, or their equivalents, constructed and operating so that the dog is maintained from contact with the tumblers until the key-hole is obstructed bythe movement of the shield, for the purpose described.

In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses. y

D. K. MILLER.

Witnesses:

CHARLES. E. FOSTER, WILLIAM P. BARD. 

